Title 35PatentsRelease 119-73

§316 Conduct of inter partes review

Title 35 › Part PART III— - PATENTS AND PROTECTION OF PATENT RIGHTS › Chapter CHAPTER 31— - INTER PARTES REVIEW › § 316

Last updated Apr 6, 2026|Official source

Summary

The Director must write rules that explain how inter partes review works. The rules must make case files public, allow asking to seal documents while a sealing request is decided, say when a review can start, let parties send extra information after filing, and explain how these reviews fit with other patent matters. The rules must limit discovery to things like depositions of people who gave sworn statements and other things needed for justice, set penalties for misuse or delay, protect confidential information, let the patent owner file a response with supporting facts and expert statements after a review starts, and let the owner try to amend the patent to cancel claims or propose a reasonable number of replacement claims (and make any amendment evidence public). The rules must allow an oral hearing, require a final decision within 1 year of starting the review (extendable no more than 6 months for good cause), set how to request joinder, and give the petitioner at least one chance to file written comments. The Director must consider effects on the economy, the patent system, and the Office’s ability to finish reviews on time. The Patent Trial and Appeal Board runs the reviews. During a review, the patent owner may file one motion to amend to cancel challenged claims or propose reasonable substitute claims. More amendment motions are allowed only if both sides ask to help a settlement or the rules allow it. Amendments cannot broaden claims or add new subject matter. The petitioner must prove unpatentability by a preponderance of the evidence.

Full Legal Text

Title 35, §316

Patents — Source: USLM XML via OLRC

(a)The Director shall prescribe regulations—
(1)providing that the file of any proceeding under this chapter shall be made available to the public, except that any petition or document filed with the intent that it be sealed shall, if accompanied by a motion to seal, be treated as sealed pending the outcome of the ruling on the motion;
(2)setting forth the standards for the showing of sufficient grounds to institute a review under section 314(a);
(3)establishing procedures for the submission of supplemental information after the petition is filed;
(4)establishing and governing inter partes review under this chapter and the relationship of such review to other proceedings under this title;
(5)setting forth standards and procedures for discovery of relevant evidence, including that such discovery shall be limited to—
(A)the deposition of witnesses submitting affidavits or declarations; and
(B)what is otherwise necessary in the interest of justice;
(6)prescribing sanctions for abuse of discovery, abuse of process, or any other improper use of the proceeding, such as to harass or to cause unnecessary delay or an unnecessary increase in the cost of the proceeding;
(7)providing for protective orders governing the exchange and submission of confidential information;
(8)providing for the filing by the patent owner of a response to the petition under section 313 after an inter partes review has been instituted, and requiring that the patent owner file with such response, through affidavits or declarations, any additional factual evidence and expert opinions on which the patent owner relies in support of the response;
(9)setting forth standards and procedures for allowing the patent owner to move to amend the patent under subsection (d) to cancel a challenged claim or propose a reasonable number of substitute claims, and ensuring that any information submitted by the patent owner in support of any amendment entered under subsection (d) is made available to the public as part of the prosecution history of the patent;
(10)providing either party with the right to an oral hearing as part of the proceeding;
(11)requiring that the final determination in an inter partes review be issued not later than 1 year after the date on which the Director notices the institution of a review under this chapter, except that the Director may, for good cause shown, extend the 1-year period by not more than 6 months, and may adjust the time periods in this paragraph in the case of joinder under section 315(c);
(12)setting a time period for requesting joinder under section 315(c); and
(13)providing the petitioner with at least 1 opportunity to file written comments within a time period established by the Director.
(b)In prescribing regulations under this section, the Director shall consider the effect of any such regulation on the economy, the integrity of the patent system, the efficient administration of the Office, and the ability of the Office to timely complete proceedings instituted under this chapter.
(c)The Patent Trial and Appeal Board shall, in accordance with section 6, conduct each inter partes review instituted under this chapter.
(d)(1)During an inter partes review instituted under this chapter, the patent owner may file 1 motion to amend the patent in 1 or more of the following ways:
(A)Cancel any challenged patent claim.
(B)For each challenged claim, propose a reasonable number of substitute claims.
(2)Additional motions to amend may be permitted upon the joint request of the petitioner and the patent owner to materially advance the settlement of a proceeding under section 317, or as permitted by regulations prescribed by the Director.
(3)An amendment under this subsection may not enlarge the scope of the claims of the patent or introduce new matter.
(e)In an inter partes review instituted under this chapter, the petitioner shall have the burden of proving a proposition of unpatentability by a preponderance of the evidence.

Legislative History

Notes & Related Subsidiaries

Editorial Notes

Amendments

2011—Pub. L. 112–29 amended section generally. Prior to amendment, section related to certificate of patentability, unpatentability, and claim cancellation. 2002—Pub. L. 107–273 made technical correction to directory language of Pub. L. 106–113, which enacted this section.

Statutory Notes and Related Subsidiaries

Effective Date

of 2011 AmendmentAmendment by Pub. L. 112–29 effective upon the expiration of the 1-year period beginning on Sept. 16, 2011, and applicable to any patent issued before, on, or after that

Effective Date

, with provisions for graduated implementation, see section 6(c)(2) of Pub. L. 112–29, set out as a note under section 311 of this title.

Effective Date

Section effective Nov. 29, 1999, and applicable to any patent issuing from an original application filed in the United States on or after that date, see section 1000(a)(9) [title IV, § 4608(a)] of Pub. L. 106–113, set out as an

Effective Date

of 1999 Amendment note under section 41 of this title.

Reference

Citations & Metadata

Citation

35 U.S.C. § 316

Title 35Patents

Last Updated

Apr 6, 2026

Release point: 119-73